Play Mission 6: An Emperor Rises. Use LSSJ Broly, Gravity Training Level l3, and Porunga's Wish. Keep pressing L + R to easily win the battle. Use any CPU, and set it to attack during the Ape Vegeta fight (SSJG Goku is recommended). Repeat this process as many times as desired. You can earn 600,000 PP an hour using this method.

Special bonuses

Successfully complete the indicated task to unlock the corresponding number of bonus points:

Mission 1: Beginning Of Battle!

Special Bonus 1: Defeat all Saibamen (5,000 points).

Mission 2: A Mysterious Enemy

Special Bonus 1: Defeat Raditz with Goku (10,000 points).

Mission 3: Hellish Training

Special Bonus 1: Defeat Piccolo (10,000 points).

Mission 4: The Fearsome Saiyan!

Special Bonus 1: Defeat Nappa last (50,000 points).

Mission 5: Nappa Cornered

Special Bonus 1: Defeat Vegeta (120,000 points).

Mission 6: An Emperor Rises

Special Bonus 1: Win without retrying (150,000 points).

Mission 7: A Powerful Enemy

Special Bonus 1: Defeat Goku with Raditz (100,000 points).

Mission 8: The Z Fighters

Special Bonus 1: Land one or more Max Chains (150,000 points).

Mission 9: Son Goku's Anger!

Special Bonus 1: Defeat Goku with Vegeta (150,000 points).

Mission 10: A Beast's Roar

Special Bonus 1: Reduce two or more of Great Ape Gohan parts to HP 0 (200,000 points).

Mission 11: Dark Shrouds Namek

Special Bonus 1: Land two or more Max Chains (70,000 points).

Special Bonus 2: Win within 2 minutes and 30 seconds (60,000 points).

Mission 12: Telekinesis VS Combat

Special Bonus 1: Defeat 12 Frieza Soldiers (50,000 points).

Special Bonus 2: Defeat Guldo within 1 minute (70,000 points).

Mission 13: Jeice And Burter

Special Bonus 1: Defeat Burter with Goku (60,000 points).

Special Bonus 2: Defeat Burter, Jeice (60,000 points).

Mission 14: It's Captain Ginyu!

Special Bonus 1: Defeat 6 Frieza Soldiers (30,000 points).

Special Bonus 2: Defeat Ginyu last (60,000 points).

Mission 15: Frieza Transforms!

Special Bonus 1: Defeat Frieza First Form with Vegeta (50,000 points).